Drawn at almost 3,000 masl by natives through the current Los Cardones National Park, it is a perfect 19 km straight line that crosses a reasonably flat pampa between the surrounding mountains.

The remarkable straight connects Provincial Route 42 that leads to Seclantás, passing 3 km through the Churqui Gigante forest, which is part of Los Cardones National Park.

The Tin Tin Straight is a straight line 18 km long, drawn at 3,000 meters above sea level. Historical references indicate that the line would have been the work of the natives, who used bonfires as milestones.

Currently paved, in its extensive plain you can see innumerable cardones. To the right is Cerro Negro and to the left is Cerro Tin Tín.

The Inca roads were erected with a practical purpose based on the foot traffic of men (including the well-known chasquis or messengers) and animals, especially llamas, on whose backs they could carry between 30 and 40 kg. They were widely used for the transfer of minerals and products of all kinds between different regions of the empire.

The different techniques applied to the construction of these roads are highly adapted to travelers, whose objective was aimed at reducing physical effort and wear and tear to a minimum. Ramps going down into ravines or up hills generally do not exceed a 20° incline.